the obama administration is not letting up. today justice department joe biden met with local leaders and law enforcement officials in philadelphia. today former congresswoman gabby giffords released a new ad. >> take it from me. congress must act. let's get this done. >> let's turn to our congressional panel tonight. let's turn to congressman elijah cummings of maryland joining us. also tonight congresswoman jan schakowsky of illinois and congressman keith ellison of illinois. >> good to be with you, ed. >> you bet. >> congressman cummings, gun violence is something that has touched you personally, that personal connection. tell the audience what it means to get something done on this issue. >> a year and a half ago, ed, my nephew, christopher cummings, an honor student at old dominion in norfolk, somebody tried to rob him at fife income the morning and burst into his apartment, and they -- he resisted the robbery, and they killed him. and, you know, ed, i can't even begin to tell you how painful this is. and i can imagine wha